Hello

I just hit upon this page and thought it might interest you people.

http://roger.trideja.com/8051/8051.html

it is a home built 8051 computer with these features
Color (ANSI) display
S-RECORD Data/Executable Downloads
Memory Dump with output by pages or continuously.
Program Execution
Automatic Stack Checking after program exits
Capable of patching the ROM On-the-fly (for example, upload a new ROM for testing in RAM, then reset & use it)
Serial Display Output. Serial connection rates from 1200 to 57.6K baud.
LCD Display output. 20x2 characters, including downloadable shapes.
Argument Parser provides easy addition of commands to the O/S.
Online help for any command.
Lots of libraries in ROM available for executables in RAM to use:
Integer Math (8-bit and 16-bit ADD, SUBTRACT, MULTIPLY, DIVIDE)
LCD Controller Interface
IDE file system (not very complete)
Serial I/O (ANSI and RAW).
Support for reading Strings
Support for reading Numbers in Hex, Decimal, and Binary transparently.


Regards
Jerson